Mounting flange



FIG. 1 is a top perspective view of the design for a mounting flange;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a side view thereof;

FIG. 4 is a top view thereof; and,

FIG. 5 is a bottom view thereof.

The broken lines in the drawings illustrate portions of a mounting flange which form no part of the claimed design. 

CLAIM The ornamental design for a mounting flange, as shown and described. 